Bug Description

With the "Software Sources" GUI it's possible to delete an configured ppa entry. But there is no possibility to delete a ppa with the add-apt-repository command. A new option would be nice:
sudo add-apt-repository --remove ppa:xxxxxxx

I'm not sure if I should change the patch-needswork tag to patch-forwarded-upstream or not since, as someone put it in #ubuntu-reviews, "we are our own upstream". Perhaps one of the Powers That Be can clear that up.

[ mac9416 ]
* Fixed bug LP: #446216: added --remove option to add-apt-reporitory.
* Fixed Bug LP: #579669 which points out that add-apt-repository will
create a sources.list.d file with illegal characters
if there are illegal characters in a PPA name